similar to: Matrix Inversion

I'm trying to test if a correlation matrix is positive semidefinite. My understanding is that a matrix is positive semidefinite if it is Hermitian and all its eigenvalues are positive. The values in my correlation matrix are real and the layout means that it is symmetric. This seems to satisfy the Hermitian criterion so I figure that my real challenge is to check if the eigenvalues are all

Dear All I am trying to do a partial canonical analysis of principal coordinates using Bray-Curtis distances. The capscale addin to R appears to be the only way of doing it, however, when I try and calculate a Bray-Curtis distance matrix either using Capscale or Vegedist (capscale I understand uses Vegedist anyway to calculate its distance matrix), R uses up all available memory on the computer,

Hi, All Recently, one of my tinc client always suffer connection drop, I was suspect the connection was not stable to cause this issue, and BTW, I’ve set the PingTimeout to 10 seconds already, but this situation still happens a lot sometimes, but when the connection drop happens, the connection recovery pretty fast, normally in a minutes. In order to deep dive into the cause, or proven the

Hi! I keep getting errors like these: oplock_break failed for file Word/einaikoon/v-Locator/IBB-Beantragung/0_Antrag_AZK.doc (dev = 301, inode = 2469218, file_id = 7). [2003/07/31 15:43:22, 0] smbd/oplock.c:oplock_break(843) oplock_break: client failure in break - shutting down this smbd. [2003/07/31 15:47:12, 0] smbd/oplock.c:oplock_break(758) oplock_break: receive_smb error (Success)

Am 15.07.2017 um 20:26 schrieb Aki Tuomi: > Hi! > Just thought I'd remind about few things, > > since v2.2.22 you can use doveadm -fjson, to print data in json format, which might be easier to parse. As for Debian stable (dovecot 2.2.27) -f json is missing from the manpage. > since v2.2.22 you can use doveadm HTTP API to get the statistics over HTTP. > > since v2.2.27

Dear all, Has someone implemented in R (or any other language) Knol DL, ten Berge JMF. Least-squares approximation of an improper correlation matrix by a proper one. Psychometrika, 1989, 54, 53-61. or any other similar algorithm? Best regards Jens Oehlschl?gel Background: I want to factanal() matrices of polychoric correlations which have negative eigenvalue. I coded Highham 2002

I can't get R-2.5.1 compiled under RedHat EL5 with gcc 4.1.1. Configure failed at the following: checking readline/history.h usability... no checking readline/history.h presence... no checking for readline/history.h... no checking readline/readline.h usability... no checking readline/readline.h presence... no checking for readline/readline.h... no checking for rl_callback_read_char in

Hello, I'm a bit desperate so I'm trying to seek help here. Many year ago, I built myself 2 file servers (5 disks enclosure for data, 2 disks enclosure for the OS) on a computer. It was running on Debian 7.11 for years without an issue and I was getting 75MB/95MB when transferring file from it to a Windows client, all having a 1gbs network card. https://i.ibb.co/N618Z4W/Debian-7.png

How can I install a dual boot centos in my laptop while my windows has UEFI partition? -- With The Best H.Lanjanian ----------------------------------------------------------------------- Hossein Lanjanian, Ph.D. student Laboratory of Systems Biology and Bioinformatics (LBB) Institute of Biochemistry and Biophysics (IBB), University of Tehran Tehran, Iran http://LBB.ut.ac.ir

Hello, I hope this has not been discussed very often previously, but I do not know how to search the archives, so I cannot prevent posting this. I installed puppet (and removed it andf installed it again, which gave me these error messages: when removing: puppetmaster: unknown service error: %preun(puppet-server-0.22.1-1.i386) scriptlet failed, exit status 1 when installing: puppet: unknown

Hello I've stumbled upon a problem for inversion of a matrix with large values, and I haven't found a solution yet... I wondered if someone could give a hand. (It is about automatic optimisation of a calibration process, which involves the inverse of the information matrix) code: ********************* > macht=0.8698965 > coeff=1.106836*10^(-8) >

Hi, I am doing PCA on several columns of data in a data.frame. I am interested in particular rows of data which may have a particular combination of 'types' of column values (without any pre-conception of what they may be). I do the following... # My data table. allDat <- read.table("big_select_thresh_5", header=1) # Where some rows look like this... # PDB SUNID1

Hello dovecot list, I'm in the middle of creating a plugin for observium[1] and would like to have it create[2] statistical graphs of my dovecot server [3]. The current state can be found here: https://image.ibb.co/efOO9a/dovecot.png However for visibility purposes it doesnt make sense and have observium plot two data sources with different orders of magnitudes right into one graph. So

Hi Rowland I am trying to follow the article but am having the error. That's why I am trying to clean up this bad subdomain. I don't know if these lists allow image attachments. So I uploaded a screenshot here. https://ibb.co/Ct3BLjL I built a new domain for this problem in our lab. The domain listed with #1 is the one created by the domain provision. However the one listed with the #2

I?m trying to pull data from one table (batting) in the Lahman Baseball database. Notice X2B for doubles and X3B for triples ? fourth and fifth from the right. The dbGetQuery function runs fine when I leave there two out but I get error messages (in red) when I include 2B/3B or X2B/X3B. Can anyone give me some direction? Thanks, Philip Heinrich

Hi, I thought about changing the RPM package the guys of Redhat created, because I wanted an Init Script for SLES10 built-in. I started documenting the steps I took. Maybe it''s useful for someone else, although in German.. but the basic steps should be useable. My little Installating puppet Howto: http://wiki.njh.eu/Konfigurationsmanagement#Installation_3 The Init Script for SLES10:

Full_Name: Krzysztof Podgorski Version: R version 2.4.1 (2006-12-18) OS: Windows XP Submission from: (NULL) (130.235.3.79) The function ''det'' works improperly for a singular matrix and returns a non-zero value even if ''solve'' reports singularity. The matrix is very simple as shown below. A <- diag(rep(c(64,8), c(8,8))) A[9:16,1] <- 8 A[1,9:16] <- 8

Howdy, I am trying to invert a matrix for the purposes of least squares. I have tried a number of things, and the variety of results has me confused. 1. When I try solve() I get the following: >Error in solve.default(t(X) %*% X) : system is computationally singular: reciprocal condition number = 3.76391e-20 2. When I try qr.solve(), I get: >Error in qr.solve(t(X) %*% X) : singular matrix

The double quotes are required by SQL if a name is not of the form letter-followed-by-any-number-of-letters-or-numbers or if the name is a SQL keyword like 'where' or 'select'. If you are doing this from a function, you may as well quote all the names. -Bill On Fri, Oct 2, 2020 at 6:18 PM Philip <herd_dog at cox.net> wrote: > The \?2B\? worked. Have no idea why. Can

Hi, I have a dataset which has around 138 variables and 30,000 cases. I am trying to calculate a mahalanobis distance matrix for them and my procedure is like this: Suppose my data is stored in mymatrix > S<-cov(mymatrix) # this is fine > D<-sapply(1:nrow(mymatrix), function(i) mahalanobis(mymatrix, mymatrix[i,], S)) Error in solve.default(cov, ...) : system is computationally